diff options
| author | Paul Walker <paul.walker@arm.com> | 2022-02-24 18:40:23 +0000 |
|---|---|---|
| committer | Paul Walker <paul.walker@arm.com> | 2022-03-04 11:54:03 +0000 |
| commit | 42b4a6227e3e6ea6d3f62ee5a65c43e5d6e46ed3 (patch) | |
| tree | 4c6b65f36b8517098df02414f9c652f2059b4cba /lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.h | |
| parent | fb42e557d8b4c8430a75391bbb5af309b5472685 (diff) | |
| download | llvm-42b4a6227e3e6ea6d3f62ee5a65c43e5d6e46ed3.zip llvm-42b4a6227e3e6ea6d3f62ee5a65c43e5d6e46ed3.tar.gz llvm-42b4a6227e3e6ea6d3f62ee5a65c43e5d6e46ed3.tar.bz2 | |
[DAGCombine] Prevent illegal ISD::SPLAT_VECTOR operations post legalisation.
When triggered during operation legalisation the affected combine
generates a splat_vector that when custom lowered for SVE fixed
length code generation, results in the original precombine sequence
and thus we enter a legalisation/combine hang.
NOTE: The patch contains no tests because I observed this issue
only when combined with other work that might never become public.
The current way AArch64 lowers ISD::SPLAT_VECTOR meant a specific
test was not possible so I'm hoping the DAGCombiner fix can be seen
as obvious. The AArch64ISelLowering change is requirted to maintain
existing code quality.
Differential Revision: https://reviews.llvm.org/D120735
Diffstat (limited to 'lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.h')
0 files changed, 0 insertions, 0 deletions